The Brit Awards 20128pm, ITV1

Oh, for the simple days when the Brits was just one show, Sam Fox and an autocue. This year, you'll need a live blog feed, an array of 140-character bitchy quips, and your trusty remote. The action starts on ITV2 with pre-show red carpet coverage and Keith Lemon at the helm. Then it's over to ITV1 for the main event: James Corden presents, with Blur in the lifetime-achievement slot. Follow-up is on ITV2, with interviews with the winners and losers. Clare Considine

Gok's Teens: The Naked Truth8pm, Channel 4

Gok Wan has firsthand experience of how tricky teenage years can be, and in the last part of Gok's Teens he draws on this to help kids who feel they don't fit in. He meets Emily, 16, who's struggling with her sexuality, and takes 19-year-old Daniel to Soho to challenge his idea of what it's like to be gay. The trademark warmth is there in abundance, as he offers reassuring words to 13-year-old carer Michael's MS-stricken dad. "I know nothing about football, mate," he proffers, disarmingly, "but I know lots about handbags and shoes." Hannah Verdier

Timothy Spall: All At Sea8.30pm, BBC4

According to the travel guide for Seahouses on the Northumberland coast: "If you possibly can, please try to avoid the working classes, as they eat ice cream, drop litter, and are rather unattractive." Or could Timothy Spall just be pulling our legs? In another charming excursion, the actor and his wife Shane sail around Britain in their Dutch barge, the Princess Matilda, stopping off at the likes of Banff in Aberdeenshire, where the dialect is so thick that the locals, as Spall points out, might as well be speaking Norwegian. Ali Catterall

Junior Doctors: Your Life In Their Hands9pm, BBC3

Tiredness is big news this week as hospital life takes its toll. Fatigue is setting in for wannabe surgeon Andy, and Priya's fifth nightshift in a row leaves her "really tired and almost a bit disinterested". Reassuring for the patients, eh? Elsewhere, Amieth contemplates a career as an anaesthetist because he fancies "an interesting job that involves some really cool drugs". But things are looking up for Made In Chelsea type Milla, as she gets her big break in dermatology and performs her first biopsy. HV

How To Grow A Planet9pm, BBC2

Professor Iain Stewart is a geologist, a rugged academic not afraid to don harness and hard hat to get into his subject. His subject for this three-part series, however, hasn't been the world of rocks, it's the flora, and their role in shaping our planet. Tonight, as he inhales deeply of a fossilised dinosaur poo, he informs us that it is humble grass that's the most remarkable plant. His journey takes him from South Africa to Senegal and to the depths of the oceans. John Robinson

The World Against Apartheid10pm, BBC4

The final episode of this excellent series sees the apartheid era run out of steam, with boycotts reducing South Africa to a pariah state, and the United Democratic Front liaising with grass-roots efforts in churches and on factory floors to make the state ungovernable. Meanwhile, ingenious means link the imprisoned Nelson Mandela with the ANC. Younger viewers will be astonished such a regime existed so recently, and with the tacit sympathy of a British PM. It didn't go meekly. "Before the end, expect rivers of blood," predicted Oliver Tambo. There were. David Stubbs